Note For Handling The Laser Pick-Up; Iop Measurement Method; Traverse Unit - Denon DVD-2910 Service Manual

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1. Label Indication of SACD Mechanism. 3 7 63 1515 0

2. Note for Handling the Laser Pick-Up

The protection for the damage of laser diode.
If you want to change the optical device unit from any other
units, you must keep the following.
(1) It should be done at the desk already took measures the
static electricity in care of removing the OPU's (Optical
device unit) connector cable.
(2) Workers should be put on the "Earth Band".
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L 13942296513
(3) It should be done to add the solder to the short land to
prevent the broken Laser diode before removing the 24P
FFC cable.
(4) Don't touch OPU's connector parts carelessly.
3. Replacement of the Laser Pick-up

(Traverse Unit)

Check the Iop (Laser drive current)
If the present Iop (current) value exceeds.+150% of the ini-
tial value, replace the Traverse unit (Laser Pick-up) with a
new one.

4. Iop Measurement Method

When measuring Laser drive current (Iop), playback the
discs (CD,DVD) described below, measure Iop for CD Laser
and DVD Laser by the test point (+5V-A2~ LD (CD), LD
(DVD))on the Main P.W.B.
www
Test Disc : DVD/DVDT-S01 or commercially available
discs.
: CD/TCD-784 (manufactured by ALMEDIO
INC) or commercially available discs.
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Laser current consumption value
ex) DVD
DVD
Q Q
3 6 7 1 3 1 5
co
.
12
DVD-2910/955
9 4 2 8
mA, CD mA
mA, CD mA
0 5 8 2 9 9 4 2 8
m
9 9
9 9